Steve:
Contact handihams. They make a "beam location indicator". I have one, and
it works great! It costs about $30 if I remember correctly. It detects
voltage differences, depending upon the direction, and makes an audible
indication for where you are. I just labeled the positions of the pointer
for certain directions, and I was all set.
Let me know if this works for you.
Best 73 from Tom Behler: KB8TYJ